A Coffee Brewing Theory "4:6 method" Invented by Tetsu Kasuya_ World Brewers Cup 2016 Champion

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A Coffee Brewing Theory "4:6 method" Invented by Tetsu Kasuya.
ワールドブリュワーズカップ2016優勝 粕谷哲の抽出理論「4:6メソッド」

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